Compound Interest Calculator
See how your money grows with compound interest
$
$
%
years
Future Value
$0.00
Total Contributions
$0.00
Interest Earned
$0.00
Initial
Added
Interest
About Compound Interest Calculator
How to Use the Compound Interest Calculator
- Enter your initial deposit (principal)
- Input the annual interest rate
- Set the investment period in years
- Add optional monthly contributions
- Choose compounding frequency
The Power of Compounding
Example: $10,000 at 7% annual return:
- After 10 years: $19,672
- After 20 years: $38,697
- After 30 years: $76,123
Adding $200/month contributions at 7%:
- After 30 years: $319,000+
Investment Rule of 72
To estimate how long it takes to double your money, divide 72 by your interest rate. At 7% return, your money doubles in about 10.3 years.
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